Lenovo boardview for the NM-E691 mainboard, revision 1.0, in TVW format at 20.1 MB. The NM-xxxx numbering is used by LCFC, the Lenovo-owned ODM that designs many IdeaPad, ThinkPad and Legion boards. Open the file in Teboview or another viewer that supports TVW. Use it to locate components and test points, follow power rails and trace short circuits. Make sure the board number and revision printed on the PCB match NM-E691 Rev 1.0 before trusting the layout.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @ShareMan_Electronic_Files. Enginerys does not host this file.
How to open a .tvw file
Binary boardview from Tebo-ICT test software, frequent for Gigabyte, MSI and many newer laptop boards.